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Finding the Fourth Proportional to 390,604.10, 539,073.83 and 237,653.15

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Solution

The fourth proportional to 390,604.10, 539,073.83 and 237,653.15 is: 327,985.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,604.10 : 539,073.83 = 237,653.15 : x
  2. Step 2: Convert to fraction form
    390,604.10/539,073.83 = 237,653.15/x
  3. Step 3: Cross multiply
    390,604.10x = 539,073.83 × 237,653.15
  4. Step 4: Simplify right side
    390,604.10x = 128,112,591,680.83
  5. Step 5: Solve for x
    x = 128,112,591,680.83/390,604.10
  6. Step 6: Final answer
    x = 327,985.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.